Data reduction and restoration of spectropolarimetric microlensed hyperspectral imager data

Context . A microlensed hyperspectral imager (MiHI) is an integral field spectrograph based on a double-sided microlens array. Aims To convert the raw data frames of such instrument to cubes, and restore them high-resolution science-ready Stokes data, new kind reduction procedure required. Methods An optimized ad hoc transfer map MiHI prototype was used into form. The modified match position image detector, which found drift considerably during course observing day. determination this move recorded flat-field images observation, be critical step in accurate gain correction cubes. converted were suitable for restoration but still contained unwanted polarimetric structure that needed removed. Results extracted restored similar spatial resolution as equivalent from context imager, while retaining spectral approximately 300 000. noise properties determined by photon statistics consistent with estimated transparency integration time sensor. As all image-restored dependent instrumental atmospheric point spread function. attempt compare other suggested had information content comparable Hinode spectro-polarimetric scan, higher temporal cadence 10s.